Locking means for mowing-machine blades.



B. C. PARSONS.

LOCKING MEANS FOR MOWING MACHINE BLADES.

APPLICATION FILED JULY 25. m4.

lglwfige Patamefi m. 27, m5.

w' iyzeaaesw I mweiiz fi' NKTED TATE BERTIE C. PARSONS, OF BOSTON," MASSACHUSETTS.

instance.

Specification of Letters Patent.

Application filed July 25, 1914. Serial No. 353,028.

To all whom it may warm-a 4 1 Be it known that 1, Bnu'rin C. fansoxs,

a citizen of the United States, residing at 7 Boston, in the count of Suffolk and State of Massachusetts, have invented an Improvement in Locking Means for Mowing-Machine lfilades, of which the following is a specification.

This invention relates to mowing-machine cutter-blades, and has for its object the provision of an improved form of lockingmeans for the cutter-blades b which said blades are very securelv held in place, and particularly against lateral strain, which means admits of the ready removal and replacement of the blades, and avoids the employment of screws and bolts which are objectionable. Figure l is a plan view of a cutter-bar with blades secured thereto. Fig. 2 is a front elevation of the same. Fig. 3 is a vertical section through one of the plates showing the holding stud. Fig. iis a similar sectional view, the locking-stud for the cutter-blade being withdrawn to permit of the removal of the blade. Fig. 5 is a detail in front elevation illustrating the deflection of the strip bearing the locking-stud.

The cutter-bar 10, has arranged upon it at regular intervals headed-rivets 12, the heads of which are extended short distances above the face of the bar, to provide spaces between and beneath them to receive the shanks of the blades ii. The shanks of the blades are made narrower than the cuttingportions thereof, incident to the formation of right angular recesses at the corners of the blank of which the blade is composed, and it is preferred that the widths of the shanks shall be substantially equal to the distance between the headed-rivets, thereby to enable said shanks to fit snugly between the rivets and the blades to abut against each other, the heads of the rivets extending over the edges or sides of the shanks'for short distances. Arranged beneath the bar 10 is a long narrow strip 16 of steel, and said strip is riveted or otherwise secured to the bar, at regular intervals, to provide unattached portions therebetween, which por-- tions are defiectable, and said strip has secured to its defiectable portions, at regular intervals, pins or studs 20, which are made long enough to extend through holes in the bar 10, and also into or throughholes in a portion ofthe shanks of the blades. gether with the headed-rivets aforesaid, hold the blades securely in piace on tl e bar. u will be observed that the \lefiectahle portions of the strip 16, are arranged opposite tl e shanks of the blades, so that the 'Jins or studs will-enter the holes in said shanks. Said unattached portions may be deflected sut'i'ieiei'itlv to withdraw the pins or studs far enough to admit of the removal of the blades, and 16h deflection may be accomplished by projecting a pry between strip and the bar, and herein recess :25 are specially provided in the bar unattached portions to receive such for instance as the enafhportion of a. screw-driver 526, which may I tn into any of the recesses and turned t iereby to deflect the adjacent portion of the strip. On account of the inherentrcsiliencv of the strip its deflected portion or portions will resume its normal position when the pry is removed This form lockingaueans is simple, and can be easily and quickly operted, and does not involve the employment of screws or bolts which are objectionable.

1. 3i mowing machine cutter bar having headed elements secured thereto with the heads spaced from the blade receiving surface of the bar, resilient strips secured to the o posing surface of tae bar and provided, at an inte'mediate point with pin. adapted for projection through an o ening formed in the bar to project said pin beyond the plate receiving surface of the bar, in combination with cutter blades having the shank portions reduced to a width approximatel l equaling the distance between the shanks of adjacent headed elements, the shanks of the cutter blades being in part formed to bear against the pins of the elements throughout a por= tion of the rounded surfaces, each of said plates being formed with an opening to receive said pin.

2. A. mowing machine cut er bar having headed elements secured thereto with the heads spaced from the blade receiving surface of the bar, resilient strips secured to the opposing surface of the bar and provided at an intermediate point with a pin adapted for projection through an opening formed in the bar to project said pin beyond plate receiving surface of the bar, in comloination with cutter blades the shank portions reduced to a width approximately cesses to permit the' insertion of means for 10 equaling the distance between the shanks of operatingvthe strip. 7 adjacent headed elements, the shanks of the In testimony whereof, I have signed my cutterblades being in part formed to bear name to this specification, in the presence of against the pins of the elements throughout two subscribing witnesses.

a portion of the rounded surfages,' each of BERTIE C. PARSONS. said plates being formed with an opening Witnesses: to receive said pin that surface of the bar B. J. NoYEs,

underlying the strip being formed with re- H. B. DAVIS. 

